云南某磷矿露天转地下开采采场稳定性分析  

Stope stability analysis of a phosphorite deposit from open pit to underground mining in Yunnan

作　　者：陈瑞红 韩正超 CHEN Ruihong;HAN Zhengchao(Yunnan Phosphate Chemical Group Co.,Ltd.,Kunming 650600,Yunnan,China;College of Earth Sciences,Guilin University of Technology,Guilin 541006,Guangxi,China)

机构地区：[1]云南磷化集团工程建设有限公司,云南昆明650600 [2]桂林理工大学地球科学学院,广西桂林541006

出　　处：《矿产与地质》2022年第2期432-438,共7页Mineral Resources and Geology

基　　金：广西自然科学基金项目(No.2018GXNSFBA281069)资助。

摘　　要：为了保障云南某磷矿资源的持续开发利用,对该矿山露天转地下开采采场的稳定性进行了评价。对矿山边坡展开了详细的现场调查,对边坡的坡高、坡角,边坡内岩(矿)体的类型、风化程度及工程性质以及结构面的产状、节理裂隙的产状等进行了测量或判定。调查结果表明,边坡结构面以平直型为主,主要为闭合的陡倾结构面,矿区岩(矿)体可划分为4个工程地质岩组。利用图形分析法对结构面产状进行分析统计,确定了优势结构面,在此基础上,利用赤平投影法定性评价了采场的稳定性。评价结果表明,结构面分布对采场稳定性有较大影响,易发生片帮冒顶等灾害事故。建议在进行地下采矿工程中,要注意采取清理浮石、锚杆加固等防护措施,同时注意做好防排水措施。In the study stope stability analysis of the deposit from open pit to underground mining is carried out in order to ensure the sustainable development and exploitation of a phosphorite deposit in Yunnan.Detailed field investigation of the mine slope is carried out,and the slope height,slope angle,rock type,weathering degree,engineering quality,the occurrence of structural planes and joints and fissures are measured or judged in this paper.The investigation result shows that the structural slope planes are mainly straight,steep and closed.The rock(ore)body can be divided into four engineering geological types.The graphic analysis method is used to analyze the occurrence of structural plane,the dominant structural plane is determined,and on this basis,the stope stability is qualitatively evaluated by the stereographic projection method.The evaluation result shows that the distribution of structural planes has a great influence on the stope stability,and disasters such as wall caving and roof fall could be easily happened.It is suggested that during the underground mining project,attention should be paid to taking protective measures such as cleaning float stones and reinforcement of bolts,and at the same time,attention should also be paid to waterproof and drainage measures.

关 键 词：采场稳定性 赤平投影 优势结构面 防护措施 

分 类 号：TD871[矿业工程—非金属矿开采] P642[矿业工程—矿山开采]